Commit cffd61a5 authored by Guido Günther's avatar Guido Günther Committed by Pavel
Browse files

leds: lm3692x: Allow to configure over voltage protection 



Overvoltage protection is currently using the default of 29V.  Make it
configurable via DT.

Signed-off-by: default avatarGuido Günther <agx@sigxcpu.org>
Acked-by: default avatarPavel Machek <pavel@ucw.cz>
Signed-off-by: default avatarPavel Machek <pavel@ucw.cz>
parent ebf59a45

drivers/leds/leds-lm3692x.c

+30 −4
Original line number Diff line number Diff line
@@ -114,6 +114,8 @@ struct lm3692x_led { 
	struct regulator *regulator;

	int led_enable;

	int model_id;



	u8 boost_ctrl;

};



static const struct reg_default lm3692x_reg_defs[] = {
@@ -249,10 +251,7 @@ static int lm3692x_init(struct lm3692x_led *led) 
	if (ret)

		goto out;



	ret = regmap_write(led->regmap, LM3692X_BOOST_CTRL,

			LM3692X_BOOST_SW_1MHZ |

			LM3692X_BOOST_SW_NO_SHIFT |

			LM3692X_OCP_PROT_1_5A);

	ret = regmap_write(led->regmap, LM3692X_BOOST_CTRL, led->boost_ctrl);

	if (ret)

		goto out;
@@ -326,6 +325,7 @@ static int lm3692x_probe_dt(struct lm3692x_led *led) 
{

	struct fwnode_handle *child = NULL;

	struct led_init_data init_data = {};

	u32 ovp;

	int ret;



	led->enable_gpio = devm_gpiod_get_optional(&led->client->dev,
@@ -350,6 +350,32 @@ static int lm3692x_probe_dt(struct lm3692x_led *led) 
		led->regulator = NULL;

	}



	led->boost_ctrl = LM3692X_BOOST_SW_1MHZ |

		LM3692X_BOOST_SW_NO_SHIFT |

		LM3692X_OCP_PROT_1_5A;

	ret = device_property_read_u32(&led->client->dev,

				       "ti,ovp-microvolt", &ovp);

	if (ret) {

		led->boost_ctrl |= LM3692X_OVP_29V;

	} else {

		switch (ovp) {

		case 17000000:

			break;

		case 21000000:

			led->boost_ctrl |= LM3692X_OVP_21V;

			break;

		case 25000000:

			led->boost_ctrl |= LM3692X_OVP_25V;

			break;

		case 29000000:

			led->boost_ctrl |= LM3692X_OVP_29V;

			break;

		default:

			dev_err(&led->client->dev, "Invalid OVP %d\n", ovp);

			return -EINVAL;

		}

	}



	child = device_get_next_child_node(&led->client->dev, child);

	if (!child) {

		dev_err(&led->client->dev, "No LED Child node\n");